78098215 has 32 divisors (see below), whose sum is σ = 104186880. Its totient is φ = 55845504.

The previous prime is 78098213. The next prime is 78098233. The reversal of 78098215 is 51289087.

It is not a de Polignac number, because 78098215 - 2¹ = 78098213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78098213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343932 + ... + 344158.

It is an arithmetic number, because the mean of its divisors is an integer number (3255840).

Almost surely, 2^78098215 is an apocalyptic number.

78098215 is a deficient number, since it is larger than the sum of its proper divisors (26088665).

78098215 is a wasteful number, since it uses less digits than its factorization.

78098215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 78098215 is about 8837.3194465290. The cubic root of 78098215 is about 427.4451259320.

The spelling of 78098215 in words is "seventy-eight million, ninety-eight thousand, two hundred fifteen".